What Is Image Quality? – Vision Campus

When assessing the image quality of different cameras, you will come across terms like sensor and pixel size, noise, signal to noise ratio, dynamic range, quantum efficiency, resolution, and the like. Perhaps you compare all these values in the cameras’ EMVA1288 datasheets, but how can you tell what value would lead to better image quality in precisely your application? In the latest Vision Campus (http://www.vision-campus.com) video our expert Thies Moeller explains how image quality can be defined and how you can evaluate the image quality of different cameras. In most cases, an amateur photographer would define the term “image quality” differently than a vision system operator. While an amateur might find an image good as long as it’s sufficiently bright and sharp, a vision system expert will most certainly think twice about the image quality his system delivers. Practical examples help make the complex issue of image quality in a vision system a comprehensible and easy-to-understand topic. What is image quality? 0:10 Introduction 00:43 EMVA1288 01:37 Quantum efficiency (QE) 02:52 Sensor sizes 03:00 Number of pixels 03:49 Pixel sizes 03:54 Example: Pixel collecting photons 05:13 Dynamic range 05:28 Example: Dynamic range - correct bright and dark image details 05:38 Example: Dynamic range - traffic camera 06:05 Image noise 06:16 Signal to noise ratio (SNR) 06:25 Example: SNR - Good and bad music signal 07:09 CMOS sensor technology 07:52 Example: Sharpness and contrast - Barcode reading 08:06 Assess two or more different cameras 08:25 Comparable conditions 09:20 Conclusion and key criteria MORE FROM THE VISION CAMPUS: What is an interface: https://www.youtube.com/watch?v=VLFTb... How does a digital industrial camera work: https://www.youtube.com/watch?v=HnAzL... What is a vision system: https://www.youtube.com/watch?v=atoUp... Have a look at http://www.vision-campus.com to find all of our exciting videos and articles about vision technology. Just make sure you stop by! SUBSCRIBE NOW FOR OTHER VIDEOS AND NEWS! http://www.youtube.com/subscription_c... LET'S CONNECT! Basler Website ► http://www.baslerweb.com Vision Campus ► http://www.vision-campus.com Google+ ► https://plus.google.com/+BaslerAG-Ahrensburg Facebook ► https://www.facebook.com/BaslerAG Twitter ► https://twitter.com/Basler_AG LinkedIn ► https://www.linkedin.com/company/basler-ag